As of March 2020 algo trading constitutes almost 18% of the total trades on the National Stock Exchange. Here is a brief overview of how algo trading started, and its future scope.
In 2010 algo trading constituted 9.26% of total trades in the equities market. This share increased to almost 18% in March 2020. Similarly, the share of high frequency trade orders has gone up from 78% to 98% between 2012 and 2017 in the derivatives segment.
At this pace algo trading might soon be the biggest mode of trading in the stock market.